To work out the estimated running cost / per hour of Ducted Air Conditioning, use one of the following equations;
- 1.Power Input (kW) x kilowatt hour cost $ (kWh) = Running Cost / hour
- 2.Cooling capacity (kW) / E.E.R. x kilowatt hour cost $ (kWh) = Running Cost / hour
Power Input and E.E.R. (Energy Efficient Ratio) should be listed in the Energy Star Label or specifications of the system, while kilowatt hour cost can be found on your last electricity bill.
Scenario: If your Ducted Air Conditioning System has 16kW cooling capacity, and the E.E.R. is 3.13, the power input will be (16 / 3.13 = 5.11 kW). If your local electricity cost kWh is 40 cents, your Ducted Air Conditioning System may cost around (5.11 x 0.4 = $ 2.04) per hour to run.
Please note that this is an estimation of running cost for reference ONLY, actual running cost may vary depending on your local energy provider, zoning, temperature setting, climate environment and the capacity of your system.